Permutaton-lock.



No. 735,447. PAI'ENTED AUG. 4, 1903'. R. L. & W. R. BENTON. PERMUTATION LOOK;

APPLIQATION FILED MAY 12, 1903.

2 SHBET$-SHEET 2.

NO MODEL.

WITNESSES INVENTOHLF 0Z B622 501V 771' Zzazuji. Benfow UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

ROY L. BENTON, OF GREELEY, AND WILLIAM R. BENTON, OF SALIDA, l COLORADO.

PERM l JTAT lON-LOCK.

SPECIFICATION forming part of Letters Patent No. 735,447, dated August 4, 1903.

Application filed May 12,1903. SerialNo. 156,769. (No model.) i

To wZZ whom it may concern.-

Be it known that we, RoYL. BENTON, of Greeley, in the county of Weld, and WILLIAM R. BENTON, of .Salida, in the county of Ohafwasher 9 and a nut 10, a like washer 9, mount= fee, State of Colorado, citizens of the United States, have invented a new and Improved Permutation-Lock, of which the following is a full, clear, and exact description.

The object of this invention is to provide simple novel details of construction fora per mutation-lock that adapt it for reliable service to secure a door in closed adjustment, dispense with a key, and which is devoid of accessible openings, thus preventing the use of explosives for destroying the look when it is in locked condition.

The invention consists in the novel construction and combination of parts, as is hereinafter described, and defined in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indizontal plane in a suitable opening a, formed cate corresponding parts in all the figures.

Figure 1 is a front face view'of a portion of a door having the improvement, showing details of the lock thereon. Fig. 2 is a horizontal sectional view substantially on the line 2 2 in Fig. 4.- Fig. 3 is a front view of the lock having the front plate removed to expose interior mechanism shown in locked condition;

and Fig. 4 is alike view, but showing the working partsin unlocked adjustment.

. The casing 5 is rectangular and of dimensions that adapt it to receive the working parts ofthe lock, oneside plate ofibeing rev movable to permit the introduction of said parts. At a suitable point within the casing 5, preferably near the center, a pivot-post 6 is positioned, and on said post the lockingdisk 7 is loosely mounted. A central perforation is formed in the disk 7 for its rotatable engagement with the post 6, and upon the circular edge of the disk a plurality of angular teeth are formed, being arranged in two groups suitably spaced apart and the teeth in each group being evenly separated. As shown, there are three teeth Sin each group;

I spaced notches b c are formed.

The disk 7 is secured on the post 6 by a ed upon the post before the disk is placed thereon, serving to space the disk from the rear side wall of the casing 5. As shown, a weight 11 is formed or secured on the disk 7 near its edge and opposite a group of the teeth 8, the weight causing the lower tooth of said group to contact with a projecting stop-pin 12 when the casing is disposed in a vertical plane, the weight then by gravity assuming the position shown in Fig. 3. Nearly opposite the weight 11 a notch 13 is formed in the periphery of the disk 7', and, as shown in Fig. 3, when the weight causes the lowest tooth 8 of the lower group of teeth to contact with the stop-pin 12 said notch is positioned near the upper wall of the easing 5. i

A locking-bolt 14 is held to slide in a hOI'l".

in the end wall 5 of the casing by clips 15 or similar means, and the bolt 14 is of such a length as will permit the inner end of the wall 5", as shown in Fig. 4.

In the upper side of the locking-bolt 14 two The notch b, that is nearest to the end wall 5 of the casing 5, receives the lower end of an arm 16, secured upon the inner portion of the shank 16, held to rock in a perforation in the front wall 5 of said casing and is adapted for rocking movement by the knob 16 secured upon the end of the shank that projects through said front wall, as shown in Fig. 2. It will be seen that by manipulation of the knob 16 the arm 16 will be adapted to slide the locking-bolt 14. so as to project the retracted outer end of the same outside of the same to be embedded in the notch 13 when r the bolt is moved inwardly, so that its outer end is flush with the outer surface of the end end wall 5 of the casing when the parts are able form (not shown) or from a recess in the jamb of a door-casement, as shown in Fig. 2, this retraction of the-bolt being permitted only when the notch 13 is located directly opposite and near the inner end of the locking-bolt.

In the casing 5, near the right-hand upper and lower corners thereof, two similar spindles 19 are rotatably supported, as will be hereinafter explained. Upon the portions of the spindles 19 20 that occupy the casing 5 and which are preferably angular in crosssection the elongated hubs 21 22 of the two similar tumbler-disks 21 22 are mounted, having mating angular axial perforations that receive the spindles. The hubs 21 22 project ateach side of the tumbler-disks 21 22 and are truly cylindrical at their ends, the latter fitting loosely into sockets oppositely formed in pairs in the inner surfaces of the front and rear wall of the casing 5. The circular tumbler-disks 21 22 have spaced teeth 23 formed on their peripheries. As shown, each disk is provided with three teeth; but this number of teeth may be changed to alter the combination, it being understood that the number of teeth 8 in each group on the tumbler-disk 7 is correspondingly changed.

The portions of the spindles 19 20 that project through the front plate 5 are of suflicient length to pass through perforations in a front plate A, forming an integral portion of a door A, wherein the lock-casing 5 is embedded and secured by any suitable means, said door having a recess or the like in its inner surface to permit the insertion of the lock therein. It is to be understood, however, that insome cases the lock may be secured upon the inner surface of the door that is not recessed.

On the ends of the spindles 19 20 which extend through the door portion A similar knobs 19 20" are mounted and secured,-the inner true ends of the knobs having close contact with the level surface of the portion A, thus preventing the introduction of explosives within the door-recess or the lockcasing. On the portion A of the door A a circular scale 24 is formed or secured around each knob 19 20, and an index-finger 25 projects from each knob to indicate on the scale to which it is adjacent.

The detent-dog 17 is provided with an 0&- set head l7 at the upper end on the side of said dog opposite the tumbler-disk 7.- A tripping-lever 26 is pivoted, as at e, near one of its ends upon the rear wall of the casing 5, 7

so that one end of the lever may have contact with the lower side of the ofiset head. 17. The longer portion of the lever 26 extends from the pivot e over the outer side of the locking tumbler-disk 7..

Two studs 27 28 project from the outer face of the disk 7, and preferably said studs are at an equal distance from the notch 13.

When the locking-bolt 14 is moved inwardly,so thatits inner end occupies the notch 13 and the det-ent-dog 17 rests upon the upper side of said bolt between the notches b c, it will be seen that by manipulation of the knob 16 the arm 16 may be rocked against the outermost shoulder of the notch b and slide the bolt outwardlya distance sufficient to locate the notch 0 below the lower end of the detent-dog, which will drop by gravity into said notch c, whereupon the inner end of the locking-bolt 14 will have clearance from the tumbler-disk 7 and the opposite end of the locking-bolt 14 will be projected a proper distance out of the lock-casing, as shown in Fig. 3.

Assuming that the working parts of the lock are in locked condition, as indicated in Fig. 3, the index-fingers 25 may be arranged to indicate upon a preselected graduation of each scale 24, and the relative positions of the two groups of teeth 8 on the disk 7 may be positioned as represented in said figure. Furthermore, the teeth 23 on the tumblerdisks 21 22 may with advantage be positionedwith regard to the teeth on the locking tumbler-disk 7, as shown in Figs. 3 and 4.

"When the bolt 14 is projected outward, as

shown in Fig. 3, the tripping-lever 26 will be supported near its inner end upon the lower stud 27, free to slide when the disk 7 is rotated in the direction of the arrow at by en-- gagementof the teeth 23 with the teeth 8. Preferably the teeth 23 on the disks 21 22,that are arranged to impinge, respectively, on the upper and lower groups of teeth 8, are of such length as will permit them to engage but a portion of their length therewith, and therefore give the locking-disk 7 a corresponding rocking movement in the direction of the arrow 00. A

To permit thezretraction of the bolt 14, it is necessary to raise the detent-dog 17 out of the notch c and at the same time effect the rocking movement of the locking tumbler-disk in 23 upon the uppermost tooth 8 and move the disk 7 a certain degree, indicated by the po sition of the index-finger 25 on the scale it is opposite, the tooth 23 leaving the tooth 8 it was engaged with. The lower knob 20 is now turned in the direction of the arrow 00 far enough to cause the lowermost tooth 23 on the lower disk 22 to engage with and give proper movement to the uppermost tooth 8 of the lower group of teeth on the disk 7.

The successive rotatable movement of the knobs 19 20 as explained, will have moved upward the middle tooth of the uppermost group of teeth 8 sufficiently to permit a tooth on the upper disk'21to engage said tooth and rock the disk 7 farther in the direction of the arrow as when the upper knob 19* is turned in the direction of the arrow m. The middle tooth 8 of the lower group of teeth on the tumbler-disk 7 will now be raised into a position which will permit the second rotatable movement of the lower knob 20 to impinge a tooth 23 on the tumbler-disk 22 against said middle tooth. The upper knob 19 is now for the third time moved in the direction of the arrow 00 a predetermined distance, and following this partial rotation of the upper disk 21, that has been actuated by the knob 19 a final turning movement of proper degree is communicated to the disk 22 by the manipulation of the lower knob 20*. The successive partial rotations of proper degree given to the .knobs 19 20 and disks 21 22 they are respectively connected to by the spindles 19 20 results in disposing the notch 13 directly opposite the inner end of the locking-bolt 14. It will also be seen that the step-by-step rocking movement of the tumbler-disk 7 in the direction of the arrow 0c,which raises the weight 11 into the position shown in Fig. 4, rocks the stud 28, that is above the lever 26, down upon said lever, that is rocked upon its pivot-supporte upwardly at the end which contacts with the head 17 of the detent-dog 17 and elevates said dog, so as to'remove it from the notch 0 simultaneously with the disposal of the notch 13 in alinement with the lockingbolt 14.

To unlock the look when the parts are arranged as just explained, it is only necessary to manipulate the knob 16 in the direction of the arrow y in Fig. 1,which will rock the arm 16 against the innermost shoulder b of the notch b,which will slide the bolt 14 so that it enters and seats upon the bottom of the notch 13, which disposes the outer end of said bolt flush with the end wall 5 of the lock-casing 5.

The varying degrees of successive rocking movements given to the tumbler-disks 21 22 are indicated by the graduations forming each scale 24, so that by noting these indices the combinations for unlocking the lock may be preserved for effecting such a purpose at any time.

Itwill be seen that when the lock iSw11l1- parts of the look when locked in adjustment being shown in Fig. 3.

It is essential for the proper operation of the disks 7 21 22 that they should have proper frictional contact with their pivot-supports, so as to prevent them from accidentally changing their positions when turned to lock the index-fingers upon a proper graduation, and it is preferred to envelop the stop-pin 12 with elastic material, so as to prevent noise when said pin is struck by the lower tooth 8 on the tumbler-disk 7.

Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. In a lock, the combination with a casing, of a tumbler-disk pivoted at itscenter in the casing and notched in its periphery, said disk being weighted opposite the notch,two groups of teeth on the periphery of the weighted disk, two rotatably-supported smaller tumbler-disks having teeth adapted to engage the teeth on the weighted disk, a slidablysupported bolt, means for manually sliding said bolt toward and from the notch in the tumbler-disk, means for holding the bolt projected from the casing, and means, controlled by the tumbler-disks, for releasing the bolt.

2. In a lock, the combination withacasing, of a tumbler-disk pivoted at its center in the casin g, notched in its periphery and weighted near the edge opposite the notch, two groups of teeth spaced apart on the edge of the weighted disk, two rotatably-supported tumbler-disks in the casing, means for manipulating said disks, teeth on the smaller disks,

adapted to engage with the teeth on the larger disk by the rotatable movement of said smaller disks, a slidably-supported lockingbolt adapted to enter the notch when said bolt is manually moved, means for manipulating the bolt, means for holding the bolt projected from the casing, and means, controlled by the tumbler-disks, for releasing the bolt.

3. In a lock of the character described, the combination with a casing, a main tumblerdisk and two smaller tumbler-disks, all pivoted in the casing, said smaller disks having teeth that control the rotatable movement of the main disk, of a locking-bolt adapted to slide in the casing so as to enter a notch in ICC jections on the main disk, adapted to engage with the lever for its support and rocking movement.

In testimony whereof we have each signed our names to this specification in the presence of two snbsoribing'witnesses.

ROY L. BENTON. WILLIAM R. BENTON.

Witnesses to the signature of Roy L. Benton:

CHAS. E. BILLINGS, LEWIS F. BENTON. Witnesses to the signature-of William R Benton:

FRANK P. BLACK, SAML. J. SPRAY. 

